Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af1964515bd9e36…

MALICIOUS

PDF

72.3 KB Created: 2021-10-11 17:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: af2c4f8748e89f7f94eaa915d74a5ddf SHA-1: e839175e0f6a4a30988f0aaf024e93d173eae65a SHA-256: 4af1964515bd9e36675035eb81eb3e48965ea8cbd6c23aae99df6f6a94b50f3f
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://sinproval.it/userfiles/files/kuxumeli.pdf In PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/94132783134.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/0888b679830c484a2e787a529629d8f4/pilaxobajilafofajoxunik.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/vagixosawusujozewefunu.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142d7abd6748---wogelifazitaxuwamexugedez.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/1893326038.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/48663618095.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/pemadamedip.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/nugavixako.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/tuvezub.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/6638796998.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/dowiwami.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/napodedafararoxunukaluso.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/161414099a7e70---zekasorezumi.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/tawilodeke.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/gazur.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613336fde8d9f---79765258263.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/64505577629.pdfIn PDF document text
    • http://metabolit.ru/files/file/73196655587.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210924063201.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16142329be15ec---dosugapumogaxaru.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/kemalafilegi.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16163a9933bb93---zosokipep.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/47823424094.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/99739108402.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/TxADE9PCSUw/uplcv?utm_term=minimum+fall+on+100mm+sewer+pipePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC09 10776 bytes
SHA-256: 67ad42ac8b924767c22e90ab241a52634d45884d7e9cbce4928570a3f549a61e
font_01_sfnt_off0000d4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 15356 bytes
SHA-256: 8c907b58b5eb6184a54cd2131254dc7ed2ebc27709f5a8a8fddee4efd42de6ef